Red Dead Redemption - Undead Nightmare ??

Only heard of this now..seems to be out in two weeks too

http://www.amazon.co.uk/Red-Dead-Redemption-Undead-Nightmare/dp/B0049B76JY/ref=sr_1_5?s=videogames&ie=UTF8&qid=1289397220&sr=1-5

Across the vast Western frontier, a plague is spreading

When former outlaw John Marston wakes up at his farmhouse, he finds a world gone insane: overnight, deranged hordes have overrun the towns and outposts of the American frontier. In a desperate attempt to save his family, Marston must traverse a world torn apart by chaos and disorder, using every skill he has to survive long enough to find a cure.

Undead Nightmare combines a terrifying single player campaign as well as the full suite of amazing multiplayer content for one of the biggest games of the year: Red Dead Redemption. Undead Nightmare is a standalone game that does not require a copy of Red Dead Redemption to be played.

Single-Player

* Take on a brand new, undead-riddled, single-player adventure
* Experience completely new gameplay mechanics, weapons, and world design
* Battle against four different Zombie classes with detailed character design
* Encounter Graveyard action areas as well as Undead and Mythical animals
* Find New Collectible Outfits and Challenges to complete
* 7+ hours of single-player gameplay

Multiplayer

* Join Friends across the Dying and Undead West in exciting Co-Op missions and Competitive Modes
* Attack and defend in Stronghold Mode, or claim territory in Land Grab
* School your friends in Poker, Liar’s Dice and Horse Racing
* Annihilate your enemies with the deadly Tomahawk and Explosive Rifle
* Play online as iconic characters from Red Dead Revolver or as the legends from Red Dead Redemption.
* 15+ hours of multiplayer gameplay